51070809818 has 32 divisors (see below), whose sum is σ = 91305919488. Its totient is φ = 20963059200.

The previous prime is 51070809817. The next prime is 51070809857. The reversal of 51070809818 is 81890807015.

It is not an unprimeable number, because it can be changed into a prime (51070809817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564473 + ... + 648668.

It is an arithmetic number, because the mean of its divisors is an integer number (2853309984).

Almost surely, 2^51070809818 is an apocalyptic number.

51070809818 is a deficient number, since it is larger than the sum of its proper divisors (40235109670).

51070809818 is a wasteful number, since it uses less digits than its factorization.

51070809818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213278.

The product of its (nonzero) digits is 161280, while the sum is 47.

The spelling of 51070809818 in words is "fifty-one billion, seventy million, eight hundred nine thousand, eight hundred eighteen".